Open AccessNotas sobre la biología del tiburón mamona <i>Mustelus lunulatus</i> (Carcharhiniformes: Triakidae) en el Pacífico Central ecuatoriano
Author(s) -
Jesús Briones-Mendoza,
Jonathan E. Pincay-Espinoza,
Javier Palma-Chávez,
Andrés Romero-Caicedo
Publication year - 2018
Publication title -
revista de biología marina y oceanografía
Language(s) - English
Resource type - Journals
eISSN - 0718-1957
pISSN - 0717-3326
DOI - 10.22370/rbmo.2018.53.2.1301
Subject(s) - biology , sexual maturity , demersal zone , reproductive biology , allometry , fishery , ecology , pelagic zone , embryo , embryogenesis
Mustelus lunulatus is the most important shark demersal species in the landings of the Ecuadorian artisanal fishery, this study was carried out to expand the knowledge about size, sex, type of growth (isometric or allometric) and reproductive aspects in males of the species. Biological traits of the sicklefin smooth-hound shark, M. lunulatus, caught in the Pacific coast of Ecuador were assessed by examining 199 individuals ranging from 41.2 to 135.0 cm in total length (TL). The means TL did not show significant differences between sexes. The sex ratio was not different from 1:1 and the weightlength relationship did not showed significant differences between males and females. Both sexes have a growth of isometric type (b males= 3.05 and b females= 3.15). Total length at sexual maturity (TL50) of male M. lunulatus, calculated from the clasper condition, was estimated to be 97.2 cm. The present study provides new information regarding the biology of M. lunulatus in Ecuadorian waters.